What performance cookies does the BBC use?

Page updated: 6 December 2018

List of performance cookies

This list will be constantly updated, therefore we recommend checking it from time to time.

Cookie name What it's for

__hs_do_not_track

In Bitesize, prevents tracking code from sending information to HubSpot. Still allows anonymised information to be sent to HubSpot, so different from opting out of cookies.

__hs_opt_out

Used in Bitesize to remember not to ask the user to accept cookies again.

__hs_testcookie

Used in Bitesize to test whether the user has support for cookies enabled.

__hssc

Keeps track of Bitesize sessions.

__hssrc

Used in Bitesize to determine if the user has restarted their browser.

__hstc

Used in Bitesize to record the domain, utk, first visit, last visit, this visit, and session number.

_ga

Used in Bitesize to set apart unique users by assigning a randomly generated number as a client identifier. Used to calculate visitor, session and campaign data for analytics reports.

_gat

In Bitesize, used to throttle the request rate.

_gid

Used in Bitesize to store and update a unique value of each page visited, distinguishing the users.

_s

Used in Bitesize to store a session identifier to monitor session counts.

_sm_au_c

Checks if a user has been authenticated.

amlbcookie

Manages server side traffic for sign in.

AMP_TOKEN

Used in Bitesize to retrieve a Client ID from AMP Client ID service. Other possible values indicate opt-out, inflight request or an error retrieving a Client ID from AMP Client ID service.

ckpf_childrens​_mandolin

It places users into pre-defined 'segments' when loading a page with an active experiment. Users in each segment will get a slightly different experience (i.e. may see a button in a different colour). 

ckpf_iplayer_​experiments

Used for iPlayer improvement experiments to give a user the correct variation of a test.

ckpf_​localnewsgeoprompt

Stores whether we have asked you to share the location or not.

ckpf_mandolin

Users are placed into pre-defined 'segments' when loading a page with an active experiment. Users in each segment will get a slightly different experience (i.e. may see a button in a different colour).

ckpf_mvt

Identifies visitors included in website optimisation tests to understand if the website is operationally efficient and delivering the right customer experience.

ckpf_sylphid

This cookie value can be disabled by turning off personalisation, it stores the hashed user ID to track signed in activity.

ckpf_tap_analytics

Stores analytics identifiers using in reporting usage of BBC TV services.

ckpf_uid

Collects data on the traffic and engagement for the site to provide the BBC with a competitive context of their performance versus the market. For more information please visit the Scorecard Research Privacy Policy.

Opt-out of ScoreCard Research cookies.

ckps_tviplayer​_playback

Remembers playback volume and mute settings.

ckps_tviplayer​_region

Stores the iPlayer TV region.

dtPC / rxVisitor / rxvt / dtSa / dtLatC

Stores session ID for world service users / Stores an (anonymous) ID for the user, to correlate across sessions on world service / Stores two timestamps, to determine session length and end of session / Saves action names across pages so we can monitor performance across pages / Measures delay of page transmission from user browser to BBC server.

You can opt in or out of this reporting in cookie settings.

hsPagesViewed​ThisSession

Used in Bitesize to keep track of page views in a session.

hubspotutk

Keeps track of a user's identity in Bitesize.

i00

Kantar for BARB

Along with other broadcasters, we share anonymous data about use of online and mobile media players with the Broadcasters' Audience Research Board (BARB), to understand how many people watch online, and how much they watch.

Kantar Media collect this data for BARB using cookies. The anonymous data collected by Kantar's cookies is only used for this purpose.

Opt-out of Kantar cookies

JSESSIONID

Used in Bitesize, to store a unique ID for the duration of the user's browsing session on a site.

messagesUtk

In Bitesize, used to recognise other users who chat with you via the messages tool.

youwantthe​cookieshown / youwantthecookie

Allows Tribepad to remember whether you had cookies turned off or on for their site to help us keep as much functionality working as possible for you.

YSC

Cookie set by YouTube to track views of embedded videos on BBC sites.

Opt-out here

Choose language: CymraegGàidhlig